Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yoshio Yuse

Atsushi Yamamoto

Hiroshi Kanno

Sumio Hanafusa

Yuto Yamanishi

In a case that the at least one transmission antenna is transmitting a high-frequency power to at least a first wireless power reception apparatus and it is detected that at least a second wireless power reception apparatus is newly electromagnetically coupled with at least one transmission antenna, a wireless power transmission apparatus changes one of a frequency or a amplitude of the high-frequency power depending on a voltage value received from each of at least the first and second wireless power reception apparatuses, to regulate the voltage value of each power reception coil included in each of at least the first and second wireless power reception apparatuses to be equal to or lower than an upper limit value of the voltage value, circuit elements included in each of the first and second wireless power reception apparatuses being durable for the upper limit value.

Wireless power transmission apparatus and wireless power transmission system

A wireless charging device includes a plurality of charging coils, a plurality of position detection coils corresponding respectively to the charging coils, and a voltage monitoring circuit for measuring a coil-end voltage of each of the position detection coils. A comparison is performed between a coil-end voltage of a first position detection coil corresponding to a charging coil used for charging and a coil-end voltage of a position detection coil adjacent to the first position detection coil, and, depending on a result of the comparison, a charging coil to be used for charging is switched to an adjacent charging coil.

Growing community of inventors

Hyogo, Japan

Yoshio Yuse